func (r *PayoutRepository) Payout(advertiserID, partnerID string, amount float32) error { advertiser, err := r.find(advertiserID) // dodajte transakciju if err != nil { return err } partner, err := r.find(partnerID) if err != nil { return err } advertiser.Balance -= amount // zaštititi SELECT FOR UPDATE partner.Hold -= amount partner.Balance += amount if err := r.save(advertiser); err != nil { return err } if err := r.save(partner); err != nil { return err } r.totalPayouts++ return nil }